528 LXII. COMPOSITA. [ Pluchea. 
corymbs of about 3 in. diameter and sessile above the last leaves. Invo- 
lucres ovoid, about 3 lines long, the outer bracts short and obtuse, passing 
into the innermost acute ones. Female florets very numerous, those ofe the 
disk rarely above 6. Anther-thils rather long.— Wight, Illustr. t. 131. 
. Australia. Islands of the Gulf of Carpentaria and the opposite mainland, R. 
a ; Port Essington, Armstrong. Extends over E. India and the Archipelago to 8. 
;hina, 
2. P. tetranthera, F. Muell. Rep. Babb. Exped.12. A rigid perennial 
or undershrub, glabrous or Ber, pubescent in the ordinary forms. Leaves 
petiolate, from small and obovate to oblong-lanceolate and 1 in. long or 
rather more, the upper ones Se es linear, “acutely and irm toothed 
or almost entire, those of the barren shoots usually obova Flower-heads 
small, often deele in clusters of 2 or 3, forming a Seit corymbose pa- 
nicle. lnvolucre narrow-ovoid, scarcely 3 lines long, the outer bracts short 
and obtuse, the inner acute rigid and dry.  Florets rather shorter than the 
N. Australia. e he Flinders, and Van Alphen rivers, F. Mueller 
Queensland. Broad Sound, R. Brown; heads of Isaacs river, Bowman ; Rock- 
hampton, 7Aozet. 
Var, tomentosa, Taller, leaves larger, and the whole plant closely but softly tomentose 
—Arnhem’s Land, F. Mu eller y i : 
3. P. ba acitisotdal; F, Muell. Herb, A much-branched erect shrub 
of a few feet, glabrous and somewhat glutinous. Leaves narrow linear, sn 
ciliolate. Style in. the males undivided. Pappas bristles not numerous 
Spiropodium festege, F. Muell. F d 
. Queens Suttor river, A Meelis Con, river, Mitchell. This ps 
first sight much resembles some of the com merican Baccharises, allied to to B. 
culata, DC., but differs in its terete not a sde meat in the shorter florets, tral 
tailed anthers, and in the heads not per bet diecions. I have always found a few age 
bit gen A sterile florets in the female heads and a few filiform female florets m 
s. 
Section II. Pcie om Flower-heads broad or hemispherical. Involueral 
bracts very narr 
main stem lanceolate and broadly decurrent. Flower-heads — 
numerous, in little nimus of 3 to 5 each.  Involueres broadly 
